linux-kernel - Re: [PATCH v2 08/10] phy: qcom-qmp: Add support for sc7180 DP phy

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Date:   Thu, 3 Sep 2020 19:29:43 -0400
From:   Jonathan Marek <jonathan@...ek.ca>
To:     Stephen Boyd <swboyd@...omium.org>,
        Kishon Vijay Abraham I <kishon@...com>,
        Vinod Koul <vkoul@...nel.org>
Cc:     linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        Jeykumar Sankaran <jsanka@...eaurora.org>,
        Chandan Uddaraju <chandanu@...eaurora.org>,
        Vara Reddy <varar@...eaurora.org>,
        Tanmay Shah <tanmay@...eaurora.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Manu Gautam <mgautam@...eaurora.org>,
        Sandeep Maheswaram <sanm@...eaurora.org>,
        Douglas Anderson <dianders@...omium.org>,
        Sean Paul <seanpaul@...omium.org>,
        Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
        Rob Clark <robdclark@...omium.org>
Subject: Re: [PATCH v2 08/10] phy: qcom-qmp: Add support for sc7180 DP phy

On 9/2/20 7:02 PM, Stephen Boyd wrote:

...

> +static const struct qmp_phy_cfg sc7180_dpphy_cfg = {
> +	.type			= PHY_TYPE_DP,
> +	.nlanes			= 1,
> +
> +	.serdes_tbl		= qmp_v3_dp_serdes_tbl,
> +	.serdes_tbl_num		= ARRAY_SIZE(qmp_v3_dp_serdes_tbl),
> +	.tx_tbl			= qmp_v3_dp_tx_tbl,
> +	.tx_tbl_num		= ARRAY_SIZE(qmp_v3_dp_tx_tbl),
> +
> +	.serdes_tbl_rbr		= qmp_v3_dp_serdes_tbl_rbr,
> +	.serdes_tbl_rbr_num	= ARRAY_SIZE(qmp_v3_dp_serdes_tbl_rbr),
> +	.serdes_tbl_hbr		= qmp_v3_dp_serdes_tbl_hbr,
> +	.serdes_tbl_hbr_num	= ARRAY_SIZE(qmp_v3_dp_serdes_tbl_hbr),
> +	.serdes_tbl_hbr2	= qmp_v3_dp_serdes_tbl_hbr2,
> +	.serdes_tbl_hbr2_num	= ARRAY_SIZE(qmp_v3_dp_serdes_tbl_hbr2),
> +	.serdes_tbl_hbr3	= qmp_v3_dp_serdes_tbl_hbr3,
> +	.serdes_tbl_hbr3_num	= ARRAY_SIZE(qmp_v3_dp_serdes_tbl_hbr3),
> +
> +	.clk_list		= qmp_v3_phy_clk_l,
> +	.num_clks		= ARRAY_SIZE(qmp_v3_phy_clk_l),
> +	.reset_list		= sc7180_usb3phy_reset_l,
> +	.num_resets		= ARRAY_SIZE(sc7180_usb3phy_reset_l),
> +	.vreg_list		= qmp_phy_vreg_l,
> +	.num_vregs		= ARRAY_SIZE(qmp_phy_vreg_l),

You need a ".regs = qmp_v3_usb3phy_regs_layout," here, otherwise phy 
init functions like qcom_qmp_phy_serdes_init() can crash on a NULL 
reference.

> +
> +	.has_phy_dp_com_ctrl	= true,
> +	.is_dual_lane_phy	= true,
> +};
> +

...